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| {{Vacuum Tube
| | #redirect[[12BY7A]] |
| |Type=Pentode
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| |Number=12BY7A
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| |EuroNumber=EL180
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| |RussianNumber=
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| |Part_nos=154-047,154-0047-00
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| |Description=miniature 6.5 W power pentode
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| |Used_in=106;163;524;531;533;535;536;541;543;535;545;545A;549;555;75;3A75;3B5;
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| |Designers=
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| }}.
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| Both the 12BY7 and the slightly improved 12BY7A are all-glass types with a {{B9A base}} and share the EIA 9BF pinout with a number of other miniature pentode tubes of the era.
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| {| class="wikitable"
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| {{Checkedtubes TableHeader}}
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| |-
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| | [[531]], [[533]], [[535]], [[536]], [[541]], [[543]], [[545]], [[555]] || 157-0053-00 || ?
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| |-
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| | [[106]] || 157-0115-00 || Note 1
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| |}
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| Note 1: Made obsolete soon after the number was allocated.
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| {{Tube aging reference}}
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| ==Data sheets and Links==
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| [[File:No64.png|right| 9BF socket diagram]]
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| * [[Media:GE 12BY7A data sheet.pdf|General Electric 12BY7A data sheet]]
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| * [[wikipedia:12BV7|12BV7 @ Wikipedia]]
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| * [[tube:12by7|12BY7]] / [[tube:12by7a|12BY7A]] @ radiomuseum.org
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| ==Used in==
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| * the output stage of the [[1121]]
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| * the first stage of the [[535]], [[545|545A]], and [[555]]
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| {{Part usage}}
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| ==Pictures==
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| <gallery>
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| 12by7a 1.jpg | RCA/Tektronix 12BY7As
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| 12by7a 2.jpg | RCA/Tektronix 12BY7As
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| 12by7a 3.jpg | RCA/Tektronix 12BY7As
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| </gallery>
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| [[Category:Vacuum tubes]]
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| [[Category:Pentodes]] | | [[Category:Pentodes]] |